If the listings are for the same Canon EF 24-105mm model, the lens itself may be identical, but the offers can still vary in price because of seller differences and item status. Common reasons include:

• different third-party sellers setting their own prices
• new vs. refurbished vs. used condition
• grey-market/imported stock versus officially distributed stock

So a lower price does not always mean a different optical version; it may just be a different seller or a lens with different warranty/support terms. That said, some Canon lenses do exist in multiple versions, so it’s always worth checking the exact full model name and listing details carefully.

Before buying, compare the seller, condition, warranty, return policy, and whether the lens is listed as refurbished, used, or imported.